Solutions by everydaycalculation.com
18 - 514 is -1356.
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Related: 2/8-5/14 1/8-10/14 1/16-5/14 1/8-5/28 3/8-5/14 1/8-15/14 1/24-5/14 1/8-5/42 5/8-5/14 1/8-25/14 1/40-5/14 1/8-5/70 7/8-5/14 1/8-35/14 1/56-5/14 1/8-5/98
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